Exertional esophageal pH-metry and manometry in recurrent chest pain

Table 2 Parameters for the clinical usefulness of exercise-provoked chest pain, exercise-provoked gastroesophageal reflux, and exercise-provoked esophageal spasm in the diagnosis of gastroesophageal reflux-related and non-gastroesophageal reflux-related spontaneous chest pain based on 24-h esophageal function examination (n = 111) (%)

Parameter	epCPforboth sCP	epCP for GER-related sCP	epCP for non-GER-related sCP	epGER for GER-related sCP	EPES for non-GER-related sCP
Accuracy	28	42	57	44	48
Sensitivity	35	0	36	36	23
Specificity	80	83	83	92	84
PPV	64	0	64	44	59
NPV	55	89	61	89	53
LR+	1.75	0	2.1	4.5	1.4
LR-	0.81	1.2	0.77	0.7	0.92

epCP: Exercise-provoked chest pain; sCP: Spontaneous chest pain; EPES: Exercise-provoked esophageal spasm; GER: Gastroesophageal reflux; PPV: Positive predictive value; NPV: Negative predictive value; LR+: Positive likelihood ratio; LR-: Negative likelihood ratio.